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Stock Option Plan and Stock Based Compensation - Summary of Unvested Stock Options (Detail) (USD $) | 12 Months Ended
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Feb. 28, 2014 | Feb. 28, 2013 | Feb. 29, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |  |  |
Unvested Beginning Balance, Number of Options | 169,954 |  |
New grants, Number of Options | 36,155 | 72,707 | 82,743
Vested, Number of Options | (93,898) |  |
Forfeited, Number of Options |  |  |
Unvested Ending Balance, Number of Options | 112,211 | 169,954 |
Unvested Beginning Balance, Weighted Average Grant Date Fair Value | $ 3.20 |  |
New grants, Weighted Average Grant Date Fair Value | $ 1.96 |  |
Vested, Weighted Average Grant Date Fair Value | $ 3.08 |  |
Forfeited, Weighted Average Grant Date Fair Value |  |  |
Unvested Ending Balance, Weighted Average Grant Date Fair Value | $ 2.89 | $ 3.20 |

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